Thesis (MA)--University of Stellenbosch, 2007. / ENGLISH ABSTRACT: Today’s competitive and dynamic business world, solicits ever higher levels of performance and productivity. At the core of this drive to higher performance is the enhancement and managing of employees’ performance through a Performance Management system. Performance Management however, is a very complex, multi-dimensional and integrated system with a number of interacting critical prerequisites. Even in ideal circumstances, these fundamental elements would, in all likelihood, not all be satisfied during the initial phases of implementing a Performance Management system. The concern existed, on the basis of the abovementioned probabilities, that the Performance Management system of the Children and Families Division (CAF) of the Department of Health and Human Services (DHHS) of Tasmania, Australia, was not enjoying optimal operational effectiveness. The aim of this study was to identify those factors in the system that are underdeveloped, possibly unsuccessfully implemented or in need of attention as they impact negatively on the effective running of the CAF’s Performance Management system. A suitable tool for this diagnostic purpose already exists in the form of the Performance Management Audit Questionnaire (PMAQ), developed by Spangenberg and Theron (1997). Through administering and analysing the PMAQ results, the CAF could obtain a clear indication of the system’s current effectiveness and would be able to identify where the problem areas are in order to refine the system for greater operational effectiveness. The results successfully identified the underdeveloped or absent areas of the organisation’s current Performance Management system. The results further found a clear difference between managerial and non-managerial perceptions of the effectiveness of the Performance Management system. The implications of these findings are discussed in terms of proposed remedial actions that could be implemented to address the problem areas. / AFRIKAANSE OPSOMMING: ‘n Konstante strewe na steeds hoër vlakke van prestasie en produktiwiteit is aan die orde van die dag in die huidige hoogs kompeterende en dinamiese besigheidswêreld. Die verbetering en bestuur van werknemers se prestasie deur middel van ‘n Prestasiebestuurstelsel, blyk ‘n sleutel te bied tot hierdie strewe na hoër prestasie. Prestasiebestuur is egter ‘n hoogs komplekse, multidimensionele en geintegreerde stelsel met ‘n aantal interverwante kritieke vereistes. Selfs onder ideale omstandighede, sou dit onwaarskynlik wees dat al hierdie fundamentele elemente aangespreek sou kon word gedurende die anvanklike fases van die implementering van ‘n Prestasiebestuurstelsel. In die lig van die bogenoemde waarskynlikhede, het daar spesifiek twyfel geheers oor die mate waartoe die Prestasiebestuurselsel van die ‘Children and Families’ (CAF) afdeling van die ‘Department of Health and Human Services (DHHS) in Tasmanië, Australie, optimale operasionele effektiwiteit weerspieël. Die doel van hierdie studie was om die faktore binne die stelsel te identifiseer wat onderskeidelik onderontwikkeld, onsuksesvol geimplementeer, of aandag benodig het ten einde hulle negatiewe impak op die effektiewe bedryf van die CAF se Prestasiebestuurstelsel aan te spreek. ‘n Geskikte hulpmiddel vir so ‘n diagnostiese doelwit het reeds bestaan in die vorm van die Performance Management Audit Questionnaire (PMAQ) wat deur Spangenberg en Theron (1997) ontwikkel is. Deur middel van die administrasie van die PMAQ en die analise van die resultate, sou die CAF ‘n duidelike aanduiding kon verkry van die stelsel se effektiwiteit en sou hulle die probleemareas kon identifiseer ten einde die stelsel tot groter operasionele effektiwiteit te verfyn. Die resultate het die leemtes en onder-ontwikkelde areas binne die organisasie se huidige Presasiebestuurselsel suksesvol geidentifiseer. Die resultate het verder gedui op ‘n duidelike verskil tussen die persepsies van bestuurders en nie-bestuurders oor die effektiwiteit van die Prestasiebestuurstelsel. Die implikasies van hierdie bevindings word ten slotte bespreek in terme van die voorgestelde remediëringsaksies wat geimplementeer sou kon word om die probleemareas aan te spreek.

Thesis (MPA)--Stellenbosch University, 2002. / ENGLISH ABSTRACT: The focus of this research assignment is the evaluation of an individual Performance Management system at local government level in the Cape Metropolitan Area. The researcher has observed a possible decline in customer satisfaction towards the Cape Metropolitan Council Administration and at other Administrations within the City of Cape Town, and the press also highlighted complaints regarding the absence of an entrenched customer care ethic among municipal officials. The researcher was concerned with the way customers are being handled by municipal officials, and sought to find a solution to the problem. The researcher conducted research on what the ideal situation should be, and how to reach the ideal situation, which included South African local government legislation and discussion documents. The researcher also conducted an opinion survey (by means of a questionnaire) within the CMC Administration, in order to obtain the opinions of employees of the City of Cape Town's CMC Administration with regard to perceptions of customer satisfaction, and the possible effect on customer satisfaction should a Performance Management system be implemented within the City of Cape Town. It was found that, should a Performance Management system be introduced within the City of Cape Town, it will contribute to efficiency in service delivery, and staff will be held accountable for their work performance. It was also found that at local government institutions (locally and internationally) where effective organisational and individual Performance Management systems had been implemented, customer satisfaction at these institutions has improved. It is therefore suggested by this research that the City of Cape Town should implement an individual Performance Management system and that customer satisfaction should improve over time. / AFRIKAANSE OPSOMMING: Die fokus van die navorsings opdrag is die evaluering van 'n individuele werkverrigting- bestuurstelsel op die vlak van plaaslike regering in die Kaapse Metropolitaanse Gebied. Die navorser het 'n moontlike afname in kliënte bevrediging teenoor die Kaapse Metropolitaanse Raad (KMR) en ander Rade binne die Kaapse Metropolitaanse Gebied opgelet, en die pers het ook klagte belig betrekkend die afwesigheid van 'n verskansekliënte-sorg etiek onder munisipale amptenare. Die navorser was bekommered met die manier waarop kliënte behandel is deur munisipale amptenare, en het probeer om 'n oplossing te vind vir die probleem. Die navorser het ondersoek ingestel, wat ingesluit het Suid_Afrikaanse plaaslike regerings-wette en besprekings-dokumente, om uit te vind wat die ideale situasie is, en hoe om hierdie situasie te bereik. Die navorser het ook 'n opinie opneming ingestel (dmv. 'n vraelys) binne die KMR Administrasie, om sodoende die opinies van die werkers van Stad Kaapstad se KMR Administrasie betreffend die waarnemings van kliënt bevrediging, en die moontlike effek op kliënt bevrediging as 'n werkverrigting bestuurstelsel in werking gebring word binne die Stad Kaapstad. Daar is gevind, dat as 'n werkverrigting bestuurstelsel voorgestel word binne die Stad Kaapstad, daar 'n verbetering sal wees in doeltreffendheid van diens gelewer, en personeel sal verantwoordelik wees vir hul werkverrigtinge. Daar is ook gevind by plaaslike regering-instansies (plaaslik en internasionaal) waar daar effektiewe werkverrigting bestuurstelsels in werking gestel is, daar 'n verbetering in kliënte bevrediging was. Dus word daar gesuggereer, deur dié navorser dat die Stad Kaapstad 'n individuele-werkverrigting bestuurstelsel moet implementeer en dat kliënt bevrediging mettertyd sal verbeter.

Thesis (MBA)--Stellenbosch University, 2001. / The aim of this study was to review the current status of the Performance Management system at Amatola District Council. A study of material and a case study on the implementation of the system at Amatola District Council is described. The performance management model designed by Good People Management has been applied and described in the text. The research results indicate that the majority of staff supports and understand the process. However, feedback and the attitudes of female employees thereof are highlighting red signals. This creates a completely new area of research of which the writer is only highlighting the issue for further research. Linking of performance management with compensation comes up as an issue, understandably so because the Council has agreed not to link the two processes. Recommendations on how to improve the system have been put forward.

Indiana University-Purdue University Indianapolis (IUPUI) / Methylmercury (MeHg) exposure from occupational, environmental and food sources is a significant threat to public health. MeHg poisonings in adults may result in severe psychological and neurological deficits, and in utero exposures can confer significant damage to the developing brain and impair neurobehavioral and intellectual development. Recent epidemiological and vertebrate studies suggest that MeHg exposure may contribute to dopamine (DA) neuron vulnerability and the propensity to develop Parkinson’s disease (PD). I have developed a novel Caenorhabditis elegans (C. elegans) model of MeHg toxicity and have shown that low, chronic exposure confers embryonic defects, developmental delays, reduction in brood size, decreased animal viability and DA neuron degeneration. Toxicant exposure results in an increase in reactive oxygen species (ROS) and the robust induction of several glutathione-S-transferases (GSTs) that are largely dependent on the PD-associated phase II antioxidant transcription factor SKN-1/Nrf2. I have also shown that SKN-1 is expressed in the DA neurons, and a reduction in SKN-1 gene expression increases MeHg-induced animal vulnerability and DA neuron degeneration. Furthermore, I incorporated a novel genome wide reverse genetic screen that identified 92 genes involved in inhibiting MeHg-induced animal death. The putative multidrug resistance protein MRP-7 was identified in the screen. I have shown that this transporter is likely expressed in DA neurons, and reduced gene expression increases cellular Hg accumulation and MeHg-associated DA neurodegeneration. My studies indicate that C. elegans is a useful genetic model to explore the molecular basis of MeHg-associated DA neurodegeneration, and may identify novel therapeutic targets to address this highly relevant health issue.

Indiana University-Purdue University Indianapolis (IUPUI) / Heat is one of the most important factors in our atmosphere for precipitation (thunderstorm) formation. Thermal energy from local urban land-cover is also a common source of heat in the lower atmosphere. This phenomenon is known as the urban heat island effect (UHI) and is identified as a substantial cause to a changing climate in surface weather modification. The proceeding study investigates this connection between the UHI and surface weather using remote sensing platforms A ten-year analysis of the Indianapolis UHI and thunderstorms were studied from the summer months of May, June, July, August and September (MJJAS) from 2002 until 2011. LANDSAT space borne satellite technology and land-surface based weather radar technology was used in this analysis for thunderstorm investigation. Precipitation areas identified from land-based NEXRAD WSR-88D technology were used to identify convection from non-synoptic forcing and non-normal surface diurnal heating scenarios. Only convection appearing from the UHI were studied and analyzed. Results showed twenty-one events over eighteen days with the year 2005 and 2011 having the largest frequency of events. The month of August had the largest concentration with seven events during the late afternoon hours. UHI results showed July had the largest heat island magnitude with April and September having the lowest magnitude in UHI temperatures. Three events of the twenty-one storm paths did not had a significant mean temperature difference in the heat island below the storm reflectivity. The nineteen storm paths that were significant had a warmer area underneath storm path development by an average 6.2°C than surrounding areas. UHI initiation points showed twelve of the twenty-one events having statistically significant differences between 2 km initiation areas and the rest of the study areas. Land-cover results showed low intensity developed areas had the most land-cover type (48%) in the 2km initiation buffer regions.

Indiana University-Purdue University Indianapolis (IUPUI) / Non-invasive surface recording of bioelectric potentials continues to be an essential tool in a variety of research and medical diagnostic procedures. However, the integrity of these recordings, and hence the reliability of subsequent analysis, diagnosis, or recommendations based on the recordings, can be significantly compromised when various types of noise are allowed to penetrate the recording circuit and contaminate the signals. In particular, for bioelectric phenomena in which the amplitude of the biosignal is relatively low, such as muscle activity (typically on the order of millivolts) or neural traffic (microvolts), external noise may substantially contaminate or even completely overwhelm the signal. In such circumstances, the tissue-electrode interface is typically the primary point of signal contamination since its impedance is relatively high compared to the rest of the recording circuit. Therefore, in the recording of low-amplitude biological signals, it is of paramount importance to minimize the impedance of the tissue-electrode interface in order to consistently obtain low-noise recordings. The aims of the current work were (1) to complete the development of a set of tools for rapid, simple, and reliable full-spectrum characterization and analytical modeling of the complex impedance of the tissue-electrode interface, and (2) to characterize the interfacial impedance and signal-to-noise ratio (SNR) at the surface of the skin across a variety of preparation methods and determine a factor or set of factors that contribute most effectively to the reduction of tissue-electrode impedance and noise contamination during recording. Specifically, we desired to test an initial hypothesis that surface abrasion is the principal determining factor in skin preparation to achieve consistently low-impedance, low-noise recordings. During the course of this master’s study, (1) a system with portable, battery-powered hardware and robust acquisition/analysis software for broadband impedance characterization has been achieved, and (2) the effects of skin preparation methods on the impedance of the tissue-electrode interface and the SNR of surface electromyographic recordings have been systematically quantified and compared in human subjects. We found our hypothesis to be strongly supported by the results: the degree of surface abrasion was the only factor that could be correlated to significant differences in either the interfacial impedance or the SNR. Given these findings, we believe that abrasion holds the key to consistently obtaining a low-impedance contact interface and high-quality recordings and should thus be considered an essential component of proper skin preparation prior to attachment of electrodes for recording of small bioelectric surface potentials.

Indiana University-Purdue University Indianapolis (IUPUI) / Over the past two decades, northern parts of the United States have experienced extreme heat conditions. Some of the notable heat wave impacts have occurred in Chicago in 1995 with over 600 reported deaths and in Philadelphia in 1993 with over 180 reported deaths. The distribution of extreme heat events in Indianapolis has varied since the year 2000. The Urban Heat Island effect has caused the temperatures to rise unusually high during the summer months. Although the number of reported deaths in Indianapolis is smaller when compared to Chicago and Philadelphia, the heat wave in the year 2010 affected primarily the vulnerable population comprised of the elderly and the lower socio-economic groups. Studying the spatial distribution of high temperatures in the vulnerable areas helps determine not only the extent of the heat affected areas, but also to devise strategies and methods to plan, mitigate, and tackle extreme heat. In addition, examining spatial patterns of vulnerability can aid in development of a heat warning system to alert the populations at risk during extreme heat events. This study focuses on the qualitative and quantitative methods used to measure extreme heat events. Land surface temperatures obtained from the Landsat TM images provide useful means by which the spatial distribution of temperatures can be studied in relation to the temporal changes and socioeconomic vulnerability. The percentile method used, helps to determine the vulnerable areas and their extents. The maximum temperatures measured using LST conversion of the original digital number values of the Landsat TM images is reliable in terms of identifying the heat-affected regions.

Indiana University-Purdue University Indianapolis (IUPUI) / The Antler and Sonoma orogenies occurred along the southwest-trending passive Pacific margin of North America during the Paleozoic concluding with the accretion of the McCloud Arc. A southeast-trending sinistral transform fault truncated the continental margin in the Permian, becoming a locus for initiation of an east-dipping subduction zone creating the Sierran magmatic arc. Constrained in age between two early Triassic tuff layers, the volcanic clasts in the breccia of Frog Lakes represent one of the earliest records of mafic magmatism in the eastern Sierra Nevada. Tholeiitic rock clasts found in the breccia of Frog Lakes in the Saddlebag Lake pendant in the east central Sierra Nevada range in composition from 48% to 63% SiO2. Boninites produced by early volcanism of subduction initiation by spontaneous nucleation at the Izu-Bonin-Mariana arc are more depleted in trace element concentrations than the clasts while andesites from the northern volcanic zone of the Andes produced on crust 50 km thick have similar levels of enrichment and provide a better geochemical modern analogue. Textural analysis of the breccia of Frog Lakes suggest a subaqueous environment of deposition from a mature magmatic arc built on continental crust > 50 km thick during the Triassic. The monzodiorites of Saddlebag and Odell Lakes are temporal intrusive equivalents of the breccia of Frog Lakes and zircon geochemistry indicates a magmatic arc petrogenesis.